Shock-absorbing mechanism



S to Q I v ep 1927 w. BLACKMORE SHOCK ABSORBING MECHANISM Filed Jan. 6. 1926 Patented Sept. 20, 1927.

UNITED STATES PATENT OFFICE.

WILLIAM nLAcxnonn, or snAnoN, rnNNsYLvAN1A,Ass'IGNon To NATIONAL MALLE- ABLE AND STEEL GAS'I'INGS ooMPANY, or cLEvELANn, OHIO, A CORPORATION 01 OHIO.

SHOCK-ABSORBING MECHANISM.

Application filed January 6, 1926. Serial No. 79,602.

Fig. 1 is a plan, partly in section, of a shock absorbing mechanism embodying my invention; Fig. 2 is an end elevation thereof with the wedge follower removed; Fig. 3 5 is an elevation of the inner face of the wedge follower; Fi 4 is a side elevation, partly in section, the follower wedge; Fig. 5 is a side elevation of one of the shoes; and Fig. 6 is a rear elevation thereof.

My invention relates to shock absorbing mechanism, and articularly to friction draft gears for rai way vehicles of the type' described in Letters Patent No. 1,192,571 of Ernest H. Schmidt, granted July 26, 1916,

Ernest H; Schmidt, granted April 29, 1919. My invention comprises an effective releasing mechanism and various features which I shall hereinafter describe and claim.

Referring to the drawings, the central friction member 2 has longitudinally extending, outwardly radiating arms 3 and terminates at its rear end in an enlarged base 4. Friction shoes 5- seat upon the friction faces of the outwardl radiating arms-3. Each friction shoe 5 as a wedging surface 6 enaged by a wedging surface 7 on the wedge 01 ower 8, a rearwardly extending dowel 9 and a spring seating surface 10 about the dowel, preferably engaged by the inner coil 11 of a spring element which at its rear end bears against the base 4. The outer coil 12 of the spring element likewise bears at its rear end upon the'base 4, but at its forward end enga es a surface 13 on the wedge follower 8. e rear face of the shoe 5 is recessed at 14 to keep the outer spring coil 12 normally out of engagement with the shoe 5.

moved a distance equal to the clearance space.

between the face 14 and the end of the spring 12, the spring 12 will come into engagement with the face .14, and thus. the'full force of both springs 11 and '12 will be brought to bear In the operation of my improved gear, as

If, however, the

upon the shoe 5, and will ensure its releaseresponding shoulders 16 on the shoe. These hooks and shoulders normally have a small clearance space therebetween, but in case the shoe sticks to the central member 2, the

- movement'of the wedge under impulse of'the spring 12 will cause the books 15 to engage the shoulders 16 and pull the shoe free from the central member.

I have found that gears constructed in accordance with my invention are particularly l effective in service and that an extremely 15 and No. 1,301,809 of Chester K. Brooks and satisfactory release after compression is obtamed. It is also to be observed that, while the compression spring 11 is of less capacity than those heretofore used in gears of the vided between shoe and wedge. In such' case the spring seat 13 would be removed such other shoe or shoes.

from the side of the follower wedge opposite The terms. and expressions which I have and not of limitation, and have no intention, in the use of such terms and expressions, of excluding any mechanical equivalents of the features shown and described, or portions thereof, but recognize that various structural modifications are possible within the scope of the. invention claimed.

' What I claim is: 1. In a frictional shock absorbing mech anism, a lon itudinally-extending included friction member havingfa plura ity of diverging longitudinally extending friction faces; a friction shoe seating-against each of said faces; a wedge follower engaging said shoes; and a plurality of springs, one of which is capable of successively transmitting pressure to thewedge and a shoe as compression abates, and'the other of which transthe shoe on the central member and also the 0 after the wedge has been release release of the shoe from such e aiement' y the first mentioned spr' 2. In a frictional ock absorbing mechanism, 8, Ion 'tudinally-extending included friction mem r having diverging arms extending longitudinally friction shoes seating upon "said arms; a w ge follower said shoes; and a plurality of coil springs nested in each other, one coil normall transmittin pressure to a shoe, andanot er coil norm y engaging said wedge, the second mentioned coil being adapted to transmit pressure to the shoe and assist in breaking its adhesion to the central member alter forcing the wedge outwardly.

3. In a frictional sh k absorb' mechanism, a longt'iudinally-extendin included friction mem r having a plura 'ty of diverging longitudinally extending friction faces; a friction shoe seating against each of said faces; a wedge follower engaging said shoes; and a plurality of s rings one of which transmits pressure to t e. wedge and another to a shoe, the shoe lying in the path of movement of the first mentioned spring but normall out of e gement therewith, said spring, owever, bemg adapted to transmit pressure to said shoe after it has moved said wedge to released position.

4. In 'a-frictional shock absorbing mechanism, a lon 'tudinally-extending included friction mem rlhaving diverging arms extending. longitudinally; friction shoes seating upon said arms; a w e follower en ing said shoes; and a plura ity of coil rings nested in each other, one coil normall ransmittin pressure to a shoe, and shot er coil norma y enga 'ng said wedge, the second mentioned coil capacity than the rst mentioned coil and being arranged to ensure release of the wedge from the shoe. a WILLIAM BLAGKMORE.

in of substantially higher 

